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HP P2050 manual Engine controller unit ECU

Models: P2050

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Engine controller unit (ECU)

WARNING! ESD sensitive component.

CAUTION: The ECU might be hot. Allow enough time for the ECU to cool after the product power is turned off.

1.Remove the following components:

●Right cover. See Right cover on page 115.

●Left cover. See Left cover on page 118.

●Rear cover, rear door, and duplex-paper-feed assembly. See Rear cover, rear door, and duplex-paper-feed assembly on page 120.

NOTE: Only the HP LaserJet P2050 Series products have a duplex-paper-feed assembly installed.

●Reverse-sensor assembly. See Reverse-sensor assembly; HP LaserJet P2050 Series on page 142.

NOTE: Only the HP LaserJet P2050 Series products have a reverse-feed sensor installed.

2.Disconnect eleven connectors (callout 1) and one ground connector (callout 2). Figure 6-97Remove the ECU (1 of 14)

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ENWW	Internal assemblies 163

Image 175

HP P2050 manual Engine controller unit ECU

Contents

HP LaserJet P2050 and P2030 Series Printers Page Page Trademark Credits Copyright and License Table of contents Paper and print media Control panel Manage and maintain Theory of operation Removal and replacement Solve problems Enww Parts and diagrams 301 Appendix a Service and supportAppendix B Specifications Appendix C Regulatory information Product basics CE457A CE459A CE460A Product comparisonHP LaserJet P2050 Series Printers HP LaserJet P2055d printer HP LaserJet P2055dn printer HP LaserJet P2035 printer HP LaserJet P2030 Series PrintersCE461A CE462A Feature Description Product features Button, 6 LED control panel Front view Product walkaround Rear view Model and serial number label Interface ports HP LaserJet P2030 Series Printers Rear view 1HP LaserJet P2035 printer Model and serial-number label location Macintosh software Software installation types for WindowsSupported product software Software included with the product Software for networks HP Web JetadminOther software provided Software for Windows Software Software for other operating systems Windows requirements System minimum requirementsMacintosh requirements 2Network product discovery Service name DescriptionConnectivity Supported networks HP LaserJet P2050 Series Printers 4IP addressing Supported network HP LaserJet P2030 Series Printers 7Messaging and management 6Network product discovery8IP addressing Product basics Control panel Control-panel layout Control panel HP LaserJet P2050 Series Printers onlyNumber Button or light Function Use the menus Use the control-panel menus Menu item Description Reports menu Menu item Sub-menu item Description System setup menu Control panel Service menu Use this menu to establish network configuration settings WEB Go button and light Control panel HP LaserJet P2030 Series Printers only Paper and print media Supported paper and print media sizes Size and dimensions Tray Optional 500-sheet DuplexerSupported paper and print media Paper for the HP LaserJet P2050 Series Printers Supported paper and print media types Recycled Tray or bin Paper type Specifications QuantityPaper for the HP LaserJet P2030 Series Printers Tray and bin capacity 2Supported paper and print media sizes Size and dimensions Tray Paper type printer driver Tray Tray and bin capacity Load trays Load paper and print mediaPaper orientation for loading trays Tray Load A6-size paper Optional Tray 3 HP LaserJet P2050 Series Printers only Manual feed Configure trays HP LaserJet P2050 Series Printers only Configure traysConfigure trays HP LaserJet P2030 Series Printers only Print to the top standard output bin Use paper output options Print to the straight-through paper path rear output Paper and print media Manage and maintain Name of report Description Print the information pagesDemo Print the information pages Supplies Status Configuration View HP ToolboxFX Event log Status Help Set up Status AlertsSet up E-mail Alerts Alerts Device Information Device Settings PostScript Paper HandlingPrinting PCL5c Shop for Supplies Network SettingsOther Links Enww Open the embedded Web server Manage a network productStatus tab Use security features Use HP Web Jetadmin software Supplies life Manage suppliesManage the print cartridge Enww Replace supplies and parts Supply replacement guidelinesRedistribute toner Change the print cartridge Enww Install product memory Install memory HP LaserJet P2050 Series Printers only Install memory HP LaserJet P2050 Series Printers only Enww Save resources permanent resources Check Dimm installation Click the Device Settings tab Enable memory for Windows Clean the print-cartridge area Clean the product Clean the paper path HP LaserJet P2030 Series Printers only Clean the paper path HP LaserJet P2050 Series Printers only Settings tab Clean the Tray 1 pickup roller Enww Enww Enww Clean the Tray 2 pickup roller Enww Reconnect the power cord, and turn the product on Manage and maintain Theory of operation Introduction 1Block diagram 2Cross-section of product Internal components Enww 1Sequence of operation TimingName Timing Purpose 3Engine control system Engine control system 4DC controller DC controller Swon Low-voltage power supply 6High-voltage power supply High-voltage power supply 7Laser/scanner system Laser/scanner system Laser failure detection Primary charging Image-formation system 10 Developing 11 Transfer 13 Fusing Pickup/feed/delivery system Pickup/feed/delivery system 16Jam detection Jam detection Enww Removal and replacement Electrostatic discharge Removal and replacement strategy 1Phillips and pozidrive screwdriver comparison Required tools After performing service Before performing service Print-quality test Post-service test Print cartridge 3Remove the Tray 2 cassette Tray 2 cassette Pickup roller Tray Rollers and pads Release two tabs 8Remove the pickup roller Tray 1 5 Removal and replacement 9Remove the pickup roller assembly Tray 2 1 Pickup roller assembly Tray Enww 13Remove the pickup roller Tray 2 5 14Remove the separation-pad assembly Tray 2 1 Separation-pad assembly Tray Transfer roller 19Remove the transfer roller 4 Removal and replacement 20Remove the transfer roller 5 Dimm door HP LaserJet P2050 Series only External panels, covers, and doors Right cover 26Remove the right cover 4 Removal and replacement Reinstall the right cover Left cover Enww Rear cover, rear door, and duplex-paper-feed assembly Remove five screws callout Enww Enww Top-cover assembly Enww Remove three screws callout 44Remove the cartridge door assembly and front cover 2 Cartridge-door assembly and front cover Carefully remove the cartridge-door assembly Reinstall the cartridge-door assembly and front cover Formatter PCA HP LaserJet P2030 Series Internal assemblies Internal assemblies Formatter PCA HP LaserJet P2050 Series Enww Paper-pickup-gear assembly 55Remove the paper-pickup-gear assembly 3 Reinstall the paper-pickup-gear assembly Enww Cartridge-door switch Tray 1 pickup solenoid Enww Fan 65Remove the fan 3 Reverse-sensor assembly HP LaserJet P2050 Series Remove the reverse-sensor assembly 68Remove the power-switch assembly 1 Removal and replacement Power-switch assembly 70Remove the power-switch assembly 3 71Remove the power-switch assembly 4 Removal and replacement 72Remove the connecting PCA 1 Connecting PCA Enww 75Remove the connecting PCA 4 76Remove the inlet-cable assembly 1 Removal and replacement Inlet-cable assembly 78Remove the inlet-cable assembly 3 Top cover assembly. See Top-cover assembly on Registration assembly 80Remove the registration assembly 2 Remove the guide Enww 85Remove the registration assembly 7 Laser/scanner assembly 87Remove the laser/scanner assembly 2 Fuser 88Remove the fuser 1 Removal and replacement Enww Enww 94Remove the fuser 7 Reinstall the fuser Engine controller unit ECU Enww 101Remove the ECU 5 Enww Enww 107Remove the ECU 11 Removal and replacement 109Remove the ECU 13 111Reinstall the fuser 1 Removal and replacement Reinstall the ECU Enww Paper-feed-guide assembly 114Remove the paper-feed-guide assembly 2 Main motor 117Remove the main motor 3 118Remove the main motor 4 Face-down-drive or duplexing-paper-feed assembly Remove the fan duct Remove the face-down-drive or duplexing-paper-feed assembly Duplex solenoid HP LaserJet P2050 Series 125Remove the paper-retaining-delivery assembly 1 Paper-retaining-delivery assembly Enww Enww Remove the paper-retaining-delivery assembly Solve problems Troubleshooting checklist Solve general problems Factors that affect product performance 1Basic problem solving Basic problem solvingProblem Cause Solution Engine test page on Engine components Print a menu map Menu map HP LaserJet P2050 Series Printers only Pre-troubleshooting checklist Troubleshooting processGeneral topic Questions For 10 to 20 minutes Drum rotation functional check Tools for troubleshootingContinuous self-test HP LaserJet P2050 Series only Half self-test functional check High-voltage contacts check Heating element checkChecking the print cartridge contacts 1High-voltage contact points on the print cartridge 2Left-side components Component locationsReference Component Description If disconnected or blocked FM1 3Right-side components Reference Component Description 4Connector PCA components Cartridge area appears 5Rear-side components6Print cartridge components Output bin appears Bin full appears 7Top components 8Tray 1 and Tray 2 components Component Distance between defects Problem-solve diagramsRepetitive image defect ruler 9Repetitive defects Description When disconnected 10Engine controller connectorsEngine controller PCA Control-panel messageLoad paper appears Supply memory error appearsOpen door and clear jam appear 11Major components Major components 12 PCAs PCAs Timing chart ChartGeneral Circuit diagram Circuit diagram 14Control-panel light messages 13Status-light legendLight status State of the product Action Processing Data Manual Feed or Continuable Error Toner Low Jam Toner Missing Paper Mount Alert message Description Recommended action Supply memory errorFuser error Scanner Error Jam in cartridge area Engine communication errorInstall black cartridge Door Open Jam in Tray Jam in output bin No paper pickup Non-HP supply installedLoad paper Manual feed Press OK Engine errorControl-panel messages Print failure Error 41.X.ErrorTurn off then on Turn off then on Laser/scanner assembly error XX Error 51.0000Fan error Press OK Door open Service errorDevice error Genuine HP supply installed Specifications Press OK for available media Cleaning mode OK to startLoad paper Load tray # Type Size Manual feed Type Size Load tray 1 Type SizeManual duplex Load tray Used cartridge in use Used cartridge installedTo accept press OK Event log messages Event-log messagesPrint the event log HP LaserJet P2050 Series Printers only Print an event log HP LaserJet P2030 Series Printers only Solve problems Common causes of jams Paper-handling problemsProduct is jammed.1 Cause Solution Jams Clear jams Jam locationsInternal areas Print-cartridge area and paper path Enww Duplex paper path HP LaserJet P2050 Series Printers only Enww Enww Input trays Tray Tray Enww Tray 3 HP LaserJet P2050 Series Printers only Output bins Enww Printed page is different from what appeared onscreen Solve image-quality problems16Printed page is different from what appeared onscreen Light print or faded Image defect examples Gray background Toner specksDropouts Vertical lines Misformed characters Toner smearLoose toner Vertical repetitive defects Curl or wave SkewWrinkles or creases Toner scatter outline Print-quality problems associated with jams Solve print-quality problemsPrint-quality problems associated with paper Print-quality problems associated with the environment Solve performance problems Solve direct-connect problems Solve connectivity problemsSolve network problems 17Secondary Service menu Service mode functionsOpen the secondary service menu Secondary service menu structure Nvram initialization HP LaserJet P2050 Series Printers only Engine resetsRestore defaults Engine test Solve problems Parts and diagrams Order parts, accessories, and supplies Memory Paper-handling accessoriesPart numbers Print cartridges Product Model Voltage Description Part number Whole unit replacement 1Common fasteners ScrewsExample Description Size Part Number How to use the parts lists and diagrams How to use the parts lists and diagrams HP LaserJet P2035 External covers, panels, and doors Description Part number Qty 2External covers, panels, and doors HP LaserJet P2035 HP LaserJet P2055 3External covers, panels, and doors HP LaserJet P2055 Hplj 2050 Series only Internal components 1 4Internal components 1 4Internal components 2 Internal components 2 5Internal components 2 Hplj 2030 Series only Hplj 2050 Series only Internal components 3 6Internal components 3 6Internal components 4 Internal components 4 7Internal components 4 7Internal components 5 Internal components 5 8Internal components 5 9Alphabetical parts list Alphabetical parts list Internal components 1 Switch, push SW301 cartridge-door interlock WC4-5171-000CN 10Numerical parts list Numerical parts listPart number Description External covers, panels, and doors HP LaserJet P2035 on RM1-6445-000CN Reverse-sensor assembly HP LaserJet P2055 Parts and diagrams Service and support Hewlett-Packard limited warranty statement Print cartridge limited warranty statement Transfer End User License Agreement End User License Agreement Customer self-repair warranty service Ljp2030series Customer support Weekly volume on-site service HP maintenance agreementsOn-site service agreements Next-day on-site service Extended warranty Appendix a Service and support Specifications Table B-3Product dimensions and weights Physical specificationsElectrical specifications Table B-1Product dimensions and weights Operating environment Acoustic emissions Appendix B Specifications Regulatory information FCC regulations Declaration of conformity Declaration of conformityDeclaration of Conformity Laser safety Safety statementsCanadian DOC regulations Luokan 1 laserlaite Laser statement for Finland Substances Table China Cables Symbols/Numerics Dimm Macintosh See also solving PCL Enww Enww TCP/IP Enww Page CE457-90980* *CE457-90980